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# frozen_string_literal: true
module Resolvers
class BlameResolver < BaseResolver
include Gitlab::Graphql::Authorize::AuthorizeResource
type Types::Blame::BlameType, null: true
calls_gitaly!
argument :from_line, GraphQL::Types::Int,
required: false,
default_value: 1,
description: 'Range starting from the line. Cannot be less than 1 or greater than `to_line`.'
argument :to_line, GraphQL::Types::Int,
required: false,
default_value: 1,
description: 'Range ending on the line. Cannot be smaller than `from_line` or greater than `from_line` + 100.'
alias_method :blob, :object
def ready?(**args)
validate_line_params!(args) if feature_enabled?
super
end
def resolve(from_line:, to_line:)
return unless feature_enabled?
authorize!
Gitlab::Blame.new(blob, blob.repository.commit(blob.commit_id),
range: (from_line..to_line))
end
private
def authorize!
read_code? || raise_resource_not_available_error!
end
def read_code?
Ability.allowed?(current_user, :read_code, blob.repository.project)
end
def feature_enabled?
Feature.enabled?(:graphql_git_blame, blob.repository.project)
end
def validate_line_params!(args)
raise_greater_than_one unless args[:from_line] >= 1
raise_greater_than_one unless args[:to_line] >= 1
return unless args[:to_line] < args[:from_line] || args[:to_line] >= args[:from_line] + 100
raise Gitlab::Graphql::Errors::ArgumentError,
'`to_line` must be greater than or equal to `from_line` and smaller than `from_line` + 100'
end
def raise_greater_than_one
raise Gitlab::Graphql::Errors::ArgumentError,
'`from_line` and `to_line` must be greater than or equal to 1'
end
end
end
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